add WebSphere_7 as value of "server.platform" and websphere-7-platform as value of "server.platform.class" when running JPA tests on WebSphere 7.0
add WebSphere_7 as value of "server.platform" and websphere-7-platform as value of "server.platform.class" when running JPA tests on WebSphere 7.0

code reviewed by Kevin Yuan


Former-commit-id: 2022a61add95975b2c973bc97a9e1bad04a14b7e
bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs